Opinions on the best air filter, performance wise for a Dyna 2013 fxdb.
Arlen Ness big sucker or S&S stealth?
Anyone used these filters?

 

Are you asking about the intake system or just the filter itself?

 

I have the S&S. I like it a lot. It has the internal breather set up like the Ness and it comes with nice hardware. I had the Ness set up on my Road King...It was pretty decent too and looked nice with the chrome back plate. IMO, you can't really go wrong...

 

im happy with my ness. although im sure either one is fine and you wont notice any difference.

 

Now my bike is older (2003), but I went from stock to a ness filter and intake; huge difference.
Went from a ness filter to an exotx and once again the difference was noticable. Exotx is the best filter imho.

 

I run the Stealth and like it a lot, but honestly, not much difference in performance for the aftermarket intakes.

Check out DK Customs and Figure Machine for nice options.

 

Just about any of the aftermarket filters are capable of moving more air than the carb / throttle body is capable of breathing in. Just pick the one you like.